These findings are important considerations for surgeons operating on this anatomy in reducing the risk of injury to ION and when administering infraorbital nerve block.
In a small percentage of skulls the IOF was located in line with the maxillary first molar tooth (3.1% on the right side), a fact that merits caution as it is likely to be associated with the possibility of causing a failed infraorbital nerve block.
 compared the postoperative analgesic effect of bilateral infraorbital nerve block
with that of peri-incisional infiltration in infant cleft lip surgery and demonstrated the superiority of nerve blocks.
Under local anesthesia (bilateral infraorbital nerve blocks
), excess tissue was marked using methylene blue dye and the redundant labial mucosal mass was excised by two elliptical excisions, one on each half of the lip, and combined with a central Z-plasty to release the constricting band (Figure 2).
Therapeutic infraorbital nerve blocks
are used in intractable and pharmacologically unresponsive trigeminal neuralgia.